ABSTRACT
Thermal methods are widely used in well oil recovery method in the United States, Russia, Venezuela, Canada, France, with a heavy viscous oil developments, and in the absence of in-situ pressure. Wherein high temperature agents are used (steam, hot water, air, oil and combustion gas) and required huge costs for the heating of the fuel and energy transporting in the well. Recovery rate with this method is 0.4-0.6 for 2.5-2.7 tons of specific steam consumption per ton of product. Researches have shown that a big amount of heat during discharge of coolant from the field of drilling wells through the horizon is lost in the rocks of the roof as well, together with the formation of recoverable oil and hot water (Minaev 2001). Technologies and devices for electric heating of wells’ bottom zone to ignite the oil reservoir near the wellbore during the process of in-situ combustion front moving and removing of paraffin-bitumen deposits from the walls of oil and gas wells are known (Mironov 2001). However, the reliability of used tubular electric heaters is very low. At the same time the efficiency of bottom zone warming is low because of weak turbulence in gasliquid mixture and heat loss by convection in the upper layers of the liquid in the well, or by heat transfer to the roof rocks by direct electrical heating of pump-compressing tubes.
